Commit graph

1960 commits

Author SHA1 Message Date
Carter Anderson
71d5702fe4
label config: change needs-triage to S-Needs-Triage 2021-07-13 13:27:14 -07:00
Carter Anderson
8c8bd3b41f
dependabot: use new C-Dependencies label 2021-07-13 12:51:48 -07:00
Gilbert Röhrbein
10b0b1ad40 docs: add hint that texture atlas padding is between tiles (#2447)
I struggled with some sprite sheet animation which was like drifting from right to left.
This PR documents the current behaviour that the padding which is used on slicing a texture into a texture atlas, is assumed to be only between tiles. In my case I had some padding also on the right side of the texture.
2021-07-12 20:29:28 +00:00
François
57c021538e rename example change_detection to have unique name (#2419)
# Objective

Noticed a warning when running tests:
```
> cargo test --workspace
warning: output filename collision.
The example target `change_detection` in package `bevy_ecs v0.5.0 (/bevy/crates/bevy_ecs)` has the same output filename as the example target `change_detection` in package `bevy v0.5.0 (/bevy)`.
Colliding filename is: /bevy/target/debug/examples/change_detection
The targets should have unique names.
Consider changing their names to be unique or compiling them separately.
This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
warning: output filename collision.
The example target `change_detection` in package `bevy_ecs v0.5.0 (/bevy/crates/bevy_ecs)` has the same output filename as the example target `change_detection` in package `bevy v0.5.0 (/bevy)`.
Colliding filename is: /bevy/target/debug/examples/change_detection.dSYM
The targets should have unique names.
Consider changing their names to be unique or compiling them separately.
This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
```


## Solution

I renamed example `change_detection` to `component_change_detection`
2021-07-12 20:09:43 +00:00
Ryan Scheel
b48ee02feb Make Remove Command's fields public (#2449)
In #2034, the `Remove` Command did not get the same treatment as the rest of the commands. There's no discussion saying it shouldn't have public fields, so I am assuming it was an oversight. This fixes that oversight.
2021-07-12 19:48:48 +00:00
TEMHOTAOKEAHA
17bd3f954f wgpu has been moved from "wgpu-rs" to "wgpu" (#2445)
Name and link update
2021-07-09 21:33:16 +00:00
Alexander Sepity
11485decca Optional .system(), part 4 (run criteria) (#2431)
# Objective

- Continue work of #2398 and friends.
- Make `.system()` optional in run criteria APIs.

## Solution

- Slight change to `RunCriteriaDescriptorCoercion` signature and implementors.
- Implement `IntoRunCriteria` for `IntoSystem` rather than `System`.
- Remove some usages of `.system()` with run criteria in tests of `stage.rs`, to verify the implementation.
2021-07-08 07:18:00 +00:00
Klim Tsoutsman
bc3f80fb85 Fix name in list of features (#2438)
# Objective

- Fix the name of the `bevy_dynamic_plugin` feature in the list of features

## Solution

- Remove the letter "s" 😶
2021-07-06 21:15:50 +00:00
Theia Vogel
85a10eccc5 Fix AssetServer::get_asset_loader deadlock (#2395)
# Objective

Fixes a possible deadlock between `AssetServer::get_asset_loader` / `AssetServer::add_loader`

A thread could take the `extension_to_loader_index` read lock,
and then have the `server.loader` write lock taken in add_loader
before it can. Then add_loader can't take the extension_to_loader_index
lock, and the program deadlocks.

To be more precise:

## Step 1: Thread 1 grabs the `extension_to_loader_index` lock on lines 138..139:

3a1867a92e/crates/bevy_asset/src/asset_server.rs (L133-L145)

## Step 2: Thread 2 grabs the `server.loader` write lock on line 107:

3a1867a92e/crates/bevy_asset/src/asset_server.rs (L103-L116)

## Step 3: Deadlock, since Thread 1 wants to grab `server.loader` on line 141...:

3a1867a92e/crates/bevy_asset/src/asset_server.rs (L133-L145)

... and Thread 2 wants to grab 'extension_to_loader_index` on lines 111..112:

3a1867a92e/crates/bevy_asset/src/asset_server.rs (L103-L116)


## Solution

Fixed by descoping the extension_to_loader_index lock, since
`get_asset_loader` doesn't need to hold the read lock on the extensions map for the duration,
just to get a copyable usize. The block might not be needed,
I think I could have gotten away with just inserting a `copied()`
call into the chain, but I wanted to make the reasoning clear for
future maintainers.
2021-07-06 17:35:16 +00:00
dintho
337e6d5893 Added Opensuse Tumbleweed (#2375)
# Objective

- Describe the objective or issue this PR addresses.
- added openSUSE Tumbleweed deps that i needed to install today 2021-06-22

## Solution

- Describe the solution used to achieve the objective above.
- added info to doc
2021-07-05 22:35:50 +00:00
François
b52edc107d use discord vanity link (#2420)
# Objective

I wanted to send the Bevy discord link to someone but couldn't find a pretty link to copy paste 

## Solution

Use the vanity link we have for discord
2021-07-01 20:41:42 +00:00
François
69e888e630 update duplicate dependency skip list (#2415)
# Objective

- CI is failing because of new duplicate dependency: https://github.com/bevyengine/bevy/pull/2414/checks?check_run_id=2946566180

## Solution

- update dependency duplicate skip list

updated `hashbrown` dependency comes from:
```
    │   │   ├── bevy_macro_utils v0.5.0
    │   │   │   ├── cargo-manifest v0.2.4
    │   │   │   │   └── toml v0.5.8
    │   │   │   │       ├── indexmap v1.7.0
    │   │   │   │       │   └── hashbrown v0.11.2
```
2021-07-01 20:41:41 +00:00
andoco
941a8fb8a3 Fix unsetting RenderLayers bit in without fn (#2409)
# Objective

Fixes how the layer bit is unset in the RenderLayers bit mask when calling the `without` method.

## Solution

Unsets the layer bit using `&=` and the inverse of the layer bit mask.
2021-07-01 20:41:40 +00:00
MinerSebas
b911a005d9 Mention creation of disjoint Querys with Without<T> in conflicting access Panic (#2413)
# Objective

Beginners semi-regularly appear on the Discord asking for help with using `QuerySet` when they have a system with conflicting data access.
This happens because the Resulting Panic message only mentions `QuerySet` as a solution, even if in most cases `Without<T>` was enough to solve the problem.

## Solution

Mention the usage of `Without<T>` to create disjoint queries as an alternative to `QuerySet`

## Open Questions

- Is `disjoint` a too technical/mathematical word?
- Should `Without<T>` be mentioned before or after `QuerySet`?
  - Before: Using `Without<T>` should be preferred and mentioning it first reinforces this for a reader.
  - After: The Panics can be very long and a Reader could skip to end and only see the `QuerySet`


Co-authored-by: MinerSebas <66798382+MinerSebas@users.noreply.github.com>
2021-07-01 20:20:11 +00:00
Aevyrie
46cae5956f Fix view vector in pbr frag to work in ortho (#2370)
# Objective

Fixes #2369

## Solution

Use the view forward direction for all frags when using ortho view.
2021-07-01 19:28:44 +00:00
Alexander Sepity
afb33234db Optional .system(), part 3 (#2422)
# Objective

- Continue work of #2398 and #2403.
- Make `.system()` syntax optional when using `.config()` API.

## Solution

- Introduce new prelude trait, `ConfigurableSystem`, that shorthands `my_system.system().config(...)` as `my_system.config(...)`.
- Expand `configure_system_local` test to also cover the new syntax.
2021-07-01 19:09:34 +00:00
Nathan Ward
c8e2415eaf [ecs] add StorageType documentation (#2394)
# Objective

- Add inline documentation for `StorageType`.
- Currently the README in `bevy_ecs` provides docs for `StorageType`, however, adding addition inline docs makes it simpler for users who are actively reading the source code.

## Solution
- Add inline docs.
2021-06-30 16:38:24 +00:00
Alexander Sepity
10f2dd3ec5 Optional .system(), part 2 (#2403)
# Objective

- Extend work done in #2398.
- Make `.system()` syntax optional when using system descriptor API.

## Solution

- Slight change to `ParallelSystemDescriptorCoercion` signature and implementors.

---

I haven't touched exclusive systems, because it looks like the only two other solutions are going back to doubling our system insertion methods, or starting to lean into stageless. The latter will invalidate the former, so I think exclusive systems should remian pariahs until stageless.

I can grep & nuke `.system()` thorughout the codebase now, which might take a while, or we can do that in subsequent PR(s).
2021-06-29 19:47:46 +00:00
Nathan Ward
46b822e3da Commands benchmarking (#2334)
# Objective

- Currently the `Commands` and `CommandQueue` have no performance testing. 
- As `Commands` are quite expensive due to the `Box<dyn Command>` allocated for each command, there should be perf tests for implementations that attempt to improve the performance.  

## Solution

- Add some benchmarking for `Commands` and `CommandQueue`.
2021-06-28 23:26:29 +00:00
Daniel McNab
c893b99224 Optional .system (#2398)
This can be your 6 months post-christmas present.

# Objective

- Make `.system` optional
- yeet
- It's ugly
- Alternative title: `.system` is dead; long live `.system`
- **yeet**

## Solution

- Use a higher ranked lifetime, and some trait magic.

N.B. This PR does not actually remove any `.system`s, except in a couple of examples. Once this is merged we can do that piecemeal across crates, and decide on syntax for labels.
2021-06-27 00:40:09 +00:00
tiagolam
1bc34b4e67 bevy_utils: Re-introduce with_capacity(). (#2393)
# Objective
Re-introduce `AHashExt` and respective `with_capacity()` implementations to give a more ergonomic way to set a `HashMap` / `HashSet` capacity.

As a note, this has also been discussed and agreed on issue #2115, which this PR addresses (leaving `new()` out of the `AHashExt` trait).

Fixes #2115.

## Solution
PR #1235 had removed the `AHashExt` trait and respective `with_capacity()`s implementations, leaving only the less ergonomic `HashMap::with_capacity_and_hasher(size, Default::default())` option available.

This re-introduces `AHashExt` and respective `with_capacity()` implementations to give a more ergonomic way to set a `HashMap` / `HashSet` capacity.
2021-06-26 19:49:35 +00:00
Jacob Gardner
52e8a19a39 Fixes Timer Precision Error Causing Panic (#2362)
# Objective

Fixes #2361 

## Solution

Uses integer division instead of floating-point which prevents precision errors, I think.
2021-06-26 19:49:34 +00:00
MinerSebas
b8f3d9c365 Allow Option<NonSend<T>> and Option<NonSendMut<T>> as SystemParam (#2345)
# Objective

Currently, you can add `Option<Res<T>` or `Option<ResMut<T>` as a SystemParam, if the Resource could potentially not exist, but this functionality doesn't exist for `NonSend` and `NonSendMut`

## Solution

Adds implementations to use `Option<NonSend<T>>` and Option<NonSendMut<T>> as SystemParams.
2021-06-26 19:29:38 +00:00
François
7854be7c10 update to major version 3 of action labeler (#2340)
# Objective

- update action labeler

## Solution

- Update to major version to not get notification update of every patch.
- Replace #2338.
2021-06-26 01:53:10 +00:00
TheRawMeatball
3a1867a92e Remove unnecessary exceptions for wgpu (#2356) 2021-06-25 07:05:23 +00:00
Patrik Buhring
7602317087 Update hexasphere to 4.0.0. (#2390)
# Objective

- Update `hexasphere` to 4.0.0, which is now licensed with dual MIT/Apache-2.0.
2021-06-25 00:35:41 +00:00
dependabot[bot]
f91def5c4b Update wgpu requirement from 0.8 to 0.9 (#2371)
Updates the requirements on [wgpu](https://github.com/gfx-rs/wgpu) to permit the latest version.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/gfx-rs/wgpu/blob/master/CHANGELOG.md">wgpu's changelog</a>.</em></p>
<blockquote>
<h1>Change Log</h1>
<h2>v0.9 (2021-06-18)</h2>
<ul>
<li>Updated:
<ul>
<li>naga to <code>v0.5</code>.</li>
</ul>
</li>
<li>Added:
<ul>
<li><code>Features::VERTEX_WRITABLE_STORAGE</code>.</li>
<li><code>Features::CLEAR_COMMANDS</code> which allows you to use <code>cmd_buf.clear_texture</code> and <code>cmd_buf.clear_buffer</code>.</li>
</ul>
</li>
<li>Changed:
<ul>
<li>Updated default storage buffer/image limit to <code>8</code> from <code>4</code>.</li>
</ul>
</li>
<li>Fixed:
<ul>
<li><code>Buffer::get_mapped_range</code> can now have a range of zero.</li>
<li>Fixed output spirv requiring the &quot;kernal&quot; capability.</li>
<li>Fixed segfault due to improper drop order.</li>
<li>Fixed incorrect dynamic stencil reference for Replace ops.</li>
<li>Fixed tracking of temporary resources.</li>
<li>Stopped unconditionally adding cubemap flags when the backend doesn't support cubemaps.</li>
</ul>
</li>
<li>Validation:
<ul>
<li>Ensure that if resources are viewed from the vertex stage, they are read only unless <code>Features::VERTEX_WRITABLE_STORAGE</code> is true.</li>
<li>Ensure storage class (i.e. storage vs uniform) is consistent between the shader and the pipeline layout.</li>
<li>Error when a color texture is used as a depth/stencil texture.</li>
<li>Check that pipeline output formats are logical</li>
<li>Added shader label to log messages if validation fails.</li>
</ul>
</li>
<li>Tracing:
<ul>
<li>Make renderpasses show up in the trace before they are run.</li>
</ul>
</li>
<li>Docs:
<ul>
<li>Fix typo in <code>PowerPreference::LowPower</code> description.</li>
</ul>
</li>
<li>Player:
<ul>
<li>Automatically start and stop RenderDoc captures.</li>
</ul>
</li>
<li>Examples:
<ul>
<li>Handle winit's unconditional exception.</li>
</ul>
</li>
<li>Internal:
<ul>
<li>Merged wgpu-rs and wgpu back into a single repository.</li>
<li>The tracker was split into two different stateful/stateless trackers to reduce overhead.</li>
<li>Added code coverage testing</li>
<li>CI can now test on lavapipe</li>
<li>Add missing extern &quot;C&quot; in wgpu-core on <code>wgpu_render_pass_execute_bundles</code></li>
<li>Fix incorrect function name <code>wgpu_render_pass_bundle_indexed_indirect</code> to <code>wgpu_render_bundle_draw_indexed_indirect</code>.</li>
</ul>
</li>
</ul>
<h2>wgpu-types-0.8.1 (2021-06-08)</h2>
<ul>
<li>fix dynamic stencil reference for Replace ops</li>
</ul>
<h2>v0.8.1 (2021-05-06)</h2>
<ul>
<li>fix SPIR-V generation from WGSL, which was broken due to &quot;Kernel&quot; capability</li>
<li>validate buffer storage classes</li>
</ul>
<h2>Unreleased</h2>
<ul>
<li>Added support for storage texture arrays for Vulkan and Metal.</li>
</ul>
<h2>v0.8 (2021-04-29)</h2>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a href="https://github.com/gfx-rs/wgpu/commits">compare view</a></li>
</ul>
</details>
<br />


Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`.

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<summary>Dependabot commands and options</summary>
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2021-06-24 16:38:02 +00:00
CGMossa
3106dc4937 Added helpful adders for systemsets (#2366)
# Objective

- This adds a way to add `SystemSet`s to Apps.
2021-06-23 16:47:08 +00:00
Nathan Stocks
f71f93c843 Derive Clone for Time (#2360)
# Objective

- Make it so that `Time` can be cloned
- Makes it so I can clone the entire current `Time` and easily pass it to the user in [Rusty Engine](https://github.com/CleanCut/rusty_engine) instead of [doing this](8302dc3914/src/game.rs (L147-L150))

## Solution

- Derive the `Clone` trait on `Time`
2021-06-22 16:57:48 +00:00
MinerSebas
39271f24d2 Exclude some Branches from running CI (#2344)
# Objective

#2230 allowed the CI to run on every Branch of this Repo.
But some Branches should not actually run the CI, which wastes the available capacity of CI runners.

### staging-squash-merge.tmp

This Branch is used by Bors when squashing a PR. 
CI shouldn't need to run here, as the actual verification happens in the staging branch

![ci](https://user-images.githubusercontent.com/66798382/122072006-82ccad00-cdf7-11eb-84c8-29356594180d.PNG)
![ci2](https://user-images.githubusercontent.com/66798382/122072030-85c79d80-cdf7-11eb-8c30-2e3088d47285.png)

### dependabot/**

Dependabot creates its branches in this Repo, which causes the CI to run twice on the same commit
![ci3](https://user-images.githubusercontent.com/66798382/122072345-c6bfb200-cdf7-11eb-8de6-3ffcbf641631.PNG)


## Solution

Exclude those branches from running CI.
2021-06-22 07:59:37 +00:00
Nathan Ward
00d8d5d5a0 fix clippy warning failing on CI (#2353)
# Objective

- CI jobs are starting to fail due to `clippy::bool-assert-comparison` and `clippy::single_component_path_imports` being triggered.

## Solution

- Fix all uses where `asset_eq!(<condition>, <bool>)` could be replace by `assert!`
- Move the `#[allow()]` for `single_component_path_imports` to `#![allow()]` at the start of the files.
2021-06-18 00:08:39 +00:00
Nathan Ward
71bf07f5c0 [assets] Fix AssetServer::get_handle_path (#2310)
# Objective

- Currently `AssetServer::get_handle_path` always returns `None` since the inner hash map is never written to.

## Solution

- Inside the `load_untracked` function, insert the asset path into the map.

This is similar to #1290 (thanks @TheRawMeatball)
2021-06-09 20:04:22 +00:00
Nathan Ward
b07b2f524e implement DetectChanges for NonSendMut (#2326)
# Objective

- The `DetectChanges` trait is used for types that detect change on mutable access (such as `ResMut`, `Mut`, etc...)
- `DetectChanges` was not implemented for `NonSendMut`

## Solution

- implement `NonSendMut` in terms of `DetectChanges`
2021-06-09 19:02:00 +00:00
MinerSebas
63047b2417 Fix bad bounds for NonSend SystemParams (#2325)
# Objective

Currently, you can't call `is_added` or `is_changed` on a `NonSend` SystemParam, unless the Resource is a Component (implements `Send` and `Sync`). 
This defeats the purpose of providing change detection for NonSend Resources.
While fixing this, I also noticed that `NonSend` does not have a bound at all on its struct.

## Solution

Change the bounds of `T` to always be `'static`.
2021-06-09 19:01:59 +00:00
François
19799b8d94 Update deny license to remove MPL as an allowed license (#2327)
# Objective

- MPL should not be an authorised license for all crates

## Solution

- Add exception for MPL for wgpu and hexasphere
- Remove security issue for a crate we don't depend on anymore
2021-06-09 18:32:19 +00:00
Waridley
5b0f40f3f1 Document FromType trait (#2323)
# Objective

Prevent future unnecessary mental effort spent figuring out why this trait exists and how to resolve the `TODO`.

## Solution

I happened to notice this trait being used when expanding the `#[derive(Reflect)]` macro in my own crate to figure out how it worked, and noticed that there was a `TODO` comment on it because it is only used in the derive macro and thus appeared to be unused.

I figured I should document my findings to prevent someone else from finding them out the hard way in the future 😆 

Co-authored-by: Waridley <Waridley64@gmail.com>
2021-06-09 18:32:18 +00:00
Callum Tolley
a40ec1c6b6 Add minimum sizes to textures to prevent crash (#2300)
# Objective
- Fixes #2299

## Solution
- Ensures that textures are never requested with 0 height/width.
2021-06-09 18:07:40 +00:00
Nathan Ward
e549f14359 [assets] properly set LoadState with invalid asset extension (#2318)
# Objective

- Currently, when calling any of the `AssetServer`'s `load` functions, if the extension does not exist for the given path, the returned handle's load state is always `LoadState::NotLoaded`. 
- This is due to the `load_async` function early returning without properly creating a `SourceInfo` for the requested asset.
- Fixes #2261

## Solution
- Add the `SourceInfo` prior to checking for valid extension loaders. And set the `LoadState` to `Failed` if the according loader does not exist.
2021-06-08 19:39:59 +00:00
forbjok
ac04c71d97 Fix Bevy crashing if no audio device is found (#2269)
Fixes https://github.com/bevyengine/bevy/issues/850
2021-06-08 03:14:38 +00:00
François
7835c92647 Log errors when loading textures from a gltf file (#2260)
When loading a gltf, if there is an error loading textures, it is completely ignored.

This can happen for example when loading a file with `jpg` textures without the `jpeg` Bevy feature enabled.
This PR adds `warn` logs for the few cases that can happen when loading a texture.

Other possible fix would be to break on first error and returning, making the asset loading failed
2021-06-08 02:46:44 +00:00
Nathan Ward
fe32a60577 [assets] set LoadState properly and more testing! (#2226)
1) Sets `LoadState` properly on all failing cases in `AssetServer::load_async`
2) Adds more tests for sad and happy paths of asset loading

_Note_: this brings in the `tempfile` crate.
2021-06-08 02:46:44 +00:00
François
c2722f713a expose texture/image conversions as From/TryFrom (#2175)
fixes #2169 

Instead of having custom methods with reduced visibility, implement `From<image::DynamicImage> for Texture` and `TryFrom<Texture> for image::DynamicImage`
2021-06-08 02:26:51 +00:00
Niklas Eicker
cebb553bff Add a readme to bevy_ecs (#2028)
[RENDERED](https://github.com/NiklasEi/bevy/blob/ecs_readme/crates/bevy_ecs/README.md)

Since I am trying to learn more about Bevy ECS at the moment, I thought this issue is a perfect fit.

This PR adds a readme to the `bevy_ecs` crate containing a minimal running example of stand alone `bevy_ecs`. Unique features like customizable component storage, Resources or change detection are introduced. For each of these features the readme links to an example in a newly created examples directory inside the `bevy_esc` crate.

Resolves #2008 

Co-authored-by: Carter Anderson <mcanders1@gmail.com>
2021-06-08 01:57:24 +00:00
Nathan Ward
21330a7217 fix automated pr labeling (#2316)
# Objective

- the PR labeler workflow will always add the `needs-traige` label to every pull request event

## Solution

- Limit this workflow to only be on the `opened` event
2021-06-07 22:37:12 +00:00
Nathan Ward
17877e8aaa Automated PR labeling (#2301)
# Objective

- Currently only issues automatically have labels assigned to them on creation.
- The enables pull requests to have the same functionality and currently only adds the `needs-triage` label to all PRs.

## Solution

- Integrate `actions/labeler@v2` into the github workflows to automatically tag PRs.
- Add a `label-config.yml` file that specifies how PRs should be labeled.
2021-06-07 20:53:27 +00:00
Yoh Deadfall
a404eb2acf Removed redundant visibility check (#2311)
Since `visible_entities_system` already checks `Visiblie::is_visible` for each entity and requires it to be `true`, there's no reason to verify visibility in `PassNode::prepare` which consumes entities produced by the system.
2021-06-07 19:02:02 +00:00
Nathan Ward
27d809fd23 [assets] remove unnecessary temporary strong handles (#2304)
# Objective

- When creating an asset, the `update_asset_storage` function was unnecessarily creating an extraneous `Handle` to the created asset via calling `set`. This has some overhead as the `RefChange::Increment/Decrement` event was being sent.  
- A similar exteraneous handle is also created in `load_async` when loading dependencies. 

## Solution

- Have the implementation use `Assets::set_untracked` and `AssetServer::load_untracked` so no intermediate handle is created.
2021-06-07 18:32:57 +00:00
MinerSebas
4fed2ee858 Use cfg attribute to filter supported extensions (#2297)
When implementing `AssetLoader ` you need to specify which File extensions are supported by that loader.
Currently, Bevy always says it supports extensions that actually require activating a Feature beforehand.

This PR adds cf attributes, so Bevy only tries to load those Extensions whose Features were activated.

This prevents Bevy from Panicking and reports such a warning:
```
Jun 02 23:05:57.139  WARN bevy_asset::asset_server: no `AssetLoader` found for the following extension: ogg
```

This also fixes the Bug, that the `png Feature had to be activated even if you wanted to load a different image format.

Fixes #640
2021-06-03 19:58:08 +00:00
Nathan Ward
c4b8210a7c Add PR Template (#2272)
This is a first step at addressing #2256 via adding a pr template.
2021-06-02 21:07:56 +00:00
Nathan Ward
19db1e402b [ecs] implement is_empty for queries (#2271)
## Problem
- The `Query` struct does not provide an easy way to check if it is empty. 
- Specifically, users have to use `.iter().peekable()` or `.iter().next().is_none()` which is not very ergonomic. 
- Fixes: #2270 

## Solution
- Implement an `is_empty` function for queries to more easily check if the query is empty.
2021-06-02 20:50:06 +00:00